Dark imported models

Hi, I have a problem. I was imported some my models from 3Ds max, full textured FBX format. When Im using it in games, these models are too dark. Dont know if is bug or I must use some renderer for it, texture isnt dark. And when Im rotating my directional light it doesnt change. If had someone a same problem, help, if not, i will post screen.
Marshall.

There’s a color adjustment for the material’s color or shade. Usually when you export from max this happens. Just change the color on the material of the models that are too dark to a lighter shade of grey or even white and this should fix your problem.

So, i did it, i set the color to white, but still it looks dark. I set the light intensity to the max and this is how it looks…:

Its dark

check vertex color ? and normal